Insulator cap



Aug. 17, 1948. c. s. CARD I xusuwroa on Filed Jan. 12. 1946 INVENTOR L'ltdrles J: lard BY XiM/ QM ATTORNEYS Patented Aug. 17. 1948 INSULATOR CAP Charles S.

Card, Cortland, Brewer-Titchener Corporation,

N. Y., assignor to The Cortland, N. Y.,

a corporation of New York Application January 12, 1946, Serial No. 640,730

1 Claim (CL 174-188) This invention relates to an improved insulatorcap and a. method oi -making the same. More particularly my invention relates'to caps for encasing and supporting insulators for electrical transmission lines.

It is an object of the present invention to provide an improved insulator cap which is inexpensive in construction and which is made of several pieces that can be readily assembled and which, when assembled, is rugged and strong, will not leak and will give satisfactory service for a long period of time.

A further object is the provision of an improved insulator cap assembled from a separately made cap body and a coupling or supporting piece and which is so designed that the same cap body may be assembled with any one of a number of different types of coupling or supporting pieces thereby simplifying both the production and storing problem.

Other objects will be lowing detailed description of the drawings in which:

Fig. 1 is a top plan view of an insulator cap apparent from the folembodying my invention,

Fig. 2 is a sectional view on the line 2--2 of Fig. 1, Fig. 3 is a side elevational view at right angles to Fig. 2, Fig. 4 is an elevational view of the clevis or car portion of the cap prior to assembly,

Fig. 5 is a sectional view of the bell portion of the cap prior to assembly and,

Figs. 6 and '7 are a top plan and side elevational views respectively of a socket member which may be used in place of the clevis or ear piece shown in Fig. 4.

My invention contemplates forming the insulator cap in a plurality of sections and thereafter assembling the sections so that the finished cap is as satisfactory in all respects as a. cap made in One piece.

In the illustrated embodiment, the cap is made in two sections, namely, a cap body [0 and the supporting or coupling portion which may take the form of clevis or ear piece ll shown in the first four flgur of the drawing or the socket piece ll shown n Figs. 6 and 'I.

The cap body is generally bell shaped having a depending apron portion l2 terminating in an inwardly turned flange I3 which serves as a positive stop for gripping the cement holding the insulator body in position. The cap body turns inwardly at. the top as indicated at l4 and is provided with a central aperture 15 whereby the 2 connecting piece is attached to the cap body. The cap both is made of a suitable metallic material and maybe formed by stamping or forging.

Similarly, the supporting or coupling piece is made of suitable metallic material and may be either a stamping or forging. The clevis or car piece shown in the first four figures of the drawing is a forged member and consists of a disk shaped base ii of larger diameter than the opening l5 and adapted to rest on the top IA of the cap body. Projecting downwardly from the disk base is a, tapered coupling lug l! which is of such a diameter that it may be inserted through the opening l5 and the upper end thereof will tightly engage the sides thereof. Projecting upwardly from the disk base are a pair of spaced parallel ears or lugs 18 provided with apertures 19 whereby the insulator cap is suspended from the supporting towers or poles.

In assembling the cap the coupling lug i1 is inserted through the aperture l5 and when fully inserted there is preferably a rigid fit between the lug and sides oi the aperture. The portion of the lug which projects inside of the cap body is then upset or riveted as indicated at 20 in Fig. 2. When thus assembled it will be seen that the base IE or the ear piece rests upon and tightly engages the outer surface of the top H of the cap body and the riveted portion 20 tightly engages the inner surface thereof. The connection is of such a nature that there can be no leakage at this point and an insulator cap having all of the strength and characteristics of a unitary cap is provided.

The cap b y In may beused with supporting nd in this manner the production and storing problems are greatly simplified in that it is only necessary to make and store one type of cap body. Coupling pieces of various types may be made to be assembled with the cap body. An example of a different type of coupling piece is shown in Figs. 6

and '7. Thus the coupling piece II' is a ball and socket type of member consisting of a body 2! formed with a conventional type of socket 22 extending inwardly from one side thereof. The socket is open at the top and is provided with overhanging walls as shown. An aperture 23 may be provided at the closed end of the socket whereby the ball or other coupling member which is inserted in the socket may be secured in position and held against accidental displacement. Depending from the body 2| is a tapered coupling lug 11' similar in structure and function to the 3 coupling lug II. The ball and socket coupling piece H may .be assembled with the insulator cap in the same manner as the clevis or ear iec I I. p In manufacturing my improved insulator cap. the cap body is made as a. separate unit by stamping or forging and similarly the coupling piece unit. In the illustrated ts, the supporting or coupling pieces are iorgings with the apertures and sockets maaccompanying claim:

I claim:

An insulator cap comprising a bell shaped cap body having a depending apron portion and a dome-shaped top portion formed with a central aperture and a, unitary coupling piece formed top portion or the cap body and covering and HARLES S. CARD.

REFERENCES CITED The following references are of record in the file of this patent:

NITED STATES PATENTS Number Name Date 1,181,229 Kobert -1 May 2, 1916 1,738,188 Lanyon Dec. 3, 1929 1,814,703 Johnson -July 14, 1931 1,897,385 Fassinger Feb. 14, 1933 1,970,659 Kortick Aug. 21, 1934 1,970,659 Kortick Aug. 21, 1934 2,195,732 Matthes Aug. 2, 1940 

